Answer:
The correct answer is a. sugar
Explanation:
Even though caffeine is also known for uprising the energy levels to a point where it could cause insomnia, the excess of sugar usually causes an increase in heart rate and insomnia. Also, coca-cola has a bigger amount of sugar than caffeine, so it explains how these high quantities could affect Xi's health.
There might be no food or places to live!
The correct answer is epithelial
Epithelial lines the cavities and organs, as well as the skin. The other remaining ones are muscle, which builds muscles, nervous, which builds the nervous system, and connective, that connects joints or similar things.